Method of coding and decoding motion vector and apparatus therefor, and method of coding and decoding picture signal and apparatus therefor
US6040863A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/107
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A difference vector determination element used in an apparatus for coding motion vector includes register memories (PMV) of which number is equal to sum of maximum transmission numbers N and M of forward predictive and backward predictive motion vectors. Motion vector counter counts the number of transmission of motion vectors to output a motion vector count signal. Register index designation signal generator designates indices of (1.about.N(N+1).about.(N+M)) in order of transmission of forward predictive or backward predictive motion vectors on the basis of attached information such as motion compensation mode, prediction type, and picture structure, etc. of motion vector, and the motion vector count signal from the motion vector counter to allow switch to perform switching operation, thus allowing register memories (PMV) and motion vectors to have one-to-one correspondence relationship. Difference circuit determines a difference between a motion vector inputted thereto and a value taken out from register memory (PMV) caused to correspond to the motion vector on the basis of motion compensation mode, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.